Conversion of Pressure to Depth for Moored Instruments Using a Reference Bottom Mounted Pressure Sensor
Conversion of Pressure to Depth for Moored Instruments Using a Reference Bottom Mounted Pressure Sensor
复制标题
使用参考底部安装压力传感器将系泊仪器的压力转换为深度
DOI：
10.1080/07055900.2015.1074883
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发表时间：
2015
期刊：
影响因子：
1.2
通讯作者：
Zhang Xiangming
中科院分区：
文献类型：
--
作者：
Li Junde;Liang Chujin;Dong Changming;Jin Weifang;Liao Guanghong;Zhou Beifeng;Ding Tao;Lu Xiaodong;Zhang Xiangming
摘要提出了一种新的方法，利用附加的海底锚定压力传感器将仪器测量的压力转换为水深。在这种分析中使用的扰动分析，这导致一个简单的公式计算水深（定义为从平均海面到仪器）的压力数据。在田间试验中，该方法比现有方法更易于应用。基于理论推导，当仪器深度在测量开始时已知时，与该方法相关的误差来自两个来源：在比仪器更深的深度处的深水密度的时间变化和重力加速度随仪器位移的变化。假设压力传感器是精确的，这两个源相对于仪器的垂直位移贡献了高达4%的误差。当仪器的垂直位移为10 m量级时，绝对误差为0.4 m量级，这在海洋测量中是预期和可接受的。 该方法适用于2012年12月在缅甸海岸沿着进行的实地实验的数据。
ABSTRACT A new method is proposed to convert pressure measured by an instrument to water depth using an additional available bottom-moored pressure sensor. A perturbation analysis is used in this analysis, which leads to a simple formula for calculating water depth (defined as one from the mean sea surface to the instrument) from the pressure data. In field experiments, this method is easier to apply than existing methods. Based on the theoretical derivation, the error associated with the method comes from two sources when the instrument depth is known at the beginning of the measurement: temporal variation of deep water density at depths deeper than the instrument and variation in the gravitational acceleration with instrument displacement. These two sources contribute up to 4% of the error relative to the vertical displacement of the instrument, assuming the pressure sensor is accurate. With the vertical displacement of the instrument being on the order of 10 m, the absolute error is on the order of 0.4 m, which is expected and acceptable in oceanic measurements. The method is applied to data from a field experiment that took place along the Myanmar coast in December 2012.